The invention discloses a multifunctional physical training auxiliary device, comprising a bottom plate; two support rods are vertically arranged on the bottom plate by fixing devices; an outer barrel sleeves each support rod; each outer barrel is provided with a locking device used for adjusting the outer barrel to the preset height; a cross rod is arranged between the two outer barrels, and the two ends of the cross rod are respectively fixed with the outer barrels; the interior of the cross rod has a hollow structure; two electrode plates are respectively arranged at the two ends in a cavity of the cross rod; a heating wire is connected between the two electrode plates; a sliding groove is formed in the cross rod; two sleeve rings are arranged on the cross rod; the two sleeve rings are respectively provided with a sliding block, and the sliding blocks are connected with the sliding groove; the lower ends of the sleeve rings are respectively connected with a pull rod. The multifunctional physical training auxiliary device provided by the invention is simple in operation; the height of the cross rod can be adjusted according to the demand of a user; secondly, the multifunctional physical training auxiliary device can be used in a cold environment, and is capable of heating the end held by the user; therefore, an efficient and safe environment is provided for body building of the user.